Hvacr enclosure having offset staggered extruded louvers

ABSTRACT

This disclosure relates generally to enclosures for HVACR units, particularly enclosures having a plurality of openings allowing airflow through the enclosure. The openings are arrayed with one column or row offset from the adjacent column or row by distances of 10-40% or 60-90% of a length of an opening. The openings may have a major axis in a vertical direction, and columns of openings are offset from one another. The distance that columns or rows are offset from one another may be at or about 30% or 70% of a length of an opening along its major axis. The openings may be extruded openings. The enclosure may be part of an HVACR unit including a spine-fin heat exchanger.

FIELD

This disclosure relates generally to enclosures for heating, ventilation, air conditioning, and refrigeration (HVACR) units, particularly enclosures having a plurality of openings arranged in a staggered pattern offset from one another.

BACKGROUND

Enclosures for HVACR units, such as enclosures for outdoor air conditioning units, outdoor heat pump units, and the like, use openings in the enclosure such as louvers to allow sufficient airflow to reach components located therein. The airflow into the HVACR unit, for example, exchanges heat with those components during operation of the HVACR unit. The airflow may enter the unit through one or more openings such as an array of louvers. Arrays of louvers provide a pressure drop below certain thresholds for proper function of the HVACR unit.

Enclosures for HVACR units may provide the structural support for the HVACR unit, including, for example, mounting of components of the HVACR system. The need for the unit to provide structural support may be based on the internal components of the HVACR system located in the unit, such as the type of heat exchanger used. Accordingly, enclosures for HVACR units may be designed to meet certain strength requirements to provide structural support to the HVACR unit.

BRIEF SUMMARY

This disclosure relates generally to enclosures for HVACR units, particularly enclosures having a plurality of openings, such as louvers, arranged in a staggered pattern, with rows or columns of the louvers offset from one another. The offset is asymmetric, such that a midpoint of a space between louvers is not at a midpoint of an adjacent louver opening, instead being offset towards an end of the adjacent louver opening. In an embodiment, the asymmetric offset is such that a midpoint of the space between louvers in one row is, with respect to the openings of louvers in adjacent rows, at a point 70% of a length of the louver from a first end of the louver opening, and 30% of a length of the louver from the opposite end of the louver.

Asymmetrically offset louvers improve the manufacturability of enclosures produced using an extrusion process, for example a process including cutting a first opening in a material used for the enclosure, then using a die to form the louver as an extruded shape in the sheet of material. The asymmetrically offset louvers allow sufficient airflow into the HVACR unit while allowing the enclosure to have the structural strength required for the transport and operation of the HVACR unit. The structural strength allows the enclosure having asymmetrically offset louvers to be used in HVACR units where the enclosure provides structural support for other components.

An enclosure for an HVACR unit according to an embodiment includes a surface, and a plurality of louvers. The louvers are arranged in an array in which adjacent louvers are asymmetrically offset from one another in at least one direction.

In an embodiment, the louvers are oriented with a major axis in a vertical direction of the HVACR unit enclosure, and the plurality of louvers arranged in an array include a first column and a second column that are asymmetrically offset from one another. In an embodiment, the first column and second column are offset by between at or about 10% and at or about 40% of the length of a louver. In an embodiment, the first column and second column are offset by between at or about 60% and at or about 90% of the length of a louver. In an embodiment, the first column and second column are offset by between at or about 10% and at or about 30% of the length of a louver. In an embodiment, the first column and second column are offset by between at or about 70% and at or about 90% of the length of a louver. In an embodiment, the first column and second column are offset by at or about 30% or at or about 70% of the length of a louver.

In an embodiment, an HVACR unit includes the HVACR unit enclosure and a spine-fin heat exchanger located within the HVACR unit enclosure. In an embodiment, each of the louvers includes a radiused section defining an opening at a surface of the HVACR unit enclosure and a section extending towards an inside of the HVACR unit enclosure from the radiused section. In an embodiment, an angle between the section extending towards an inside of the HVACR unit enclosure and a wall of the HVACR unit enclosure is at or about 80 degrees. In an embodiment, the first column and the second column each include between 10 and 16 louvers based on the size of the enclosure.

In an embodiment, the louvers are oriented with a major axis in a horizontal direction of the HVACR unit enclosure, and the plurality of louvers arranged in an array include a first row and a second row that are asymmetrically offset from one another. In an embodiment, the first row and second row are offset by between at or about 10% and at or about 40% of the length of a louver. In an embodiment, the first row and second row are offset by between at or about 60% and at or about 90% of the length of a louver. In an embodiment, the first row and second row are offset by between at or about 10% and at or about 30% of the length of a louver. In an embodiment, the first row and second row are offset by between at or about 70% and at or about 90% of the length of a louver. In an embodiment, the first row and second row are offset by at or about 30% or at or about 70% of the length of a louver.

In an embodiment, an HVACR unit includes the HVACR unit enclosure and a spine-fin heat exchanger located within the HVACR unit enclosure. In an embodiment, each of the louvers includes a radiused section defining an opening at a surface of the HVACR unit enclosure and a section extending towards an inside of the HVACR unit enclosure from the radiused section. In an embodiment, an angle between the section extending towards an inside of the HVACR unit enclosure and a wall of the HVACR unit enclosure is at or about 80 degrees. In an embodiment, the first row and the second row each include between 10 and 16 louvers based on the size of the enclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

References are made to the accompanying drawings that form a part of this disclosure, and which illustrate embodiments in which the systems and methods described in this specification can be practiced.

FIG. 1 is a perspective view of an HVACR unit including an enclosure according to an embodiment.

FIG. 2 is a view of the pattern of louvers on the surface of an enclosure according to an embodiment.

FIG. 3 is a cross-section of an individual louver according to an embodiment.

FIG. 4 is a view of the pattern of louvers on the surface of an enclosure according to an embodiment.

FIG. 5 is a prior art HVACR unit enclosure having a symmetric array of openings.

DETAILED DESCRIPTION

This disclosure relates generally to enclosures for HVACR units, particularly enclosures having a plurality of openings (e.g., louvers) arranged in a staggered pattern, with rows or columns of the louvers offset from one another. The offset is asymmetric, such that a midpoint of a space between louvers is not at a midpoint of an adjacent louver opening, instead being offset towards an end of the adjacent louver opening. In an embodiment, the asymmetric offset is such that a midpoint of the space between louvers in one row or column is, with respect to the openings of louvers in adjacent rows or columns, at a point 70% of a length of the louver from a first end of the louver opening, and 30% of a length of the louver from the opposite end of the louver.

Asymmetrically offset louvers improve the manufacturability of enclosures produced using an extrusion process, for example a process including cutting a first opening in a material used for the enclosure, then using a die to form the louver as an extruded shape in the sheet of material. The asymmetrically offset louvers allow sufficient airflow into the HVACR unit while allowing the enclosure to have the structural strength required for the transport and operation of the HVACR unit. The structural strength allows the enclosure having asymmetrically offset louvers to be used in HVACR units where the enclosure provides structural support for other components.

FIG. 1 is a perspective view of an HVACR unit 100 including an enclosure 102 according to an embodiment. Enclosure 102 has louvers 104 formed in the walls of the enclosure 102. Louvers 104 are arranged such that they have a major axis extending in a vertical direction 112 of the HVACR unit 100. The louvers 104 are arranged into columns. Each column is asymmetrically offset with respect to the adjacent columns.

HVACR unit 100 may be, for example, an outdoor unit of a residential or commercial air conditioning system. In an embodiment, HVACR unit 100 is an outdoor unit of a heat pump. In an embodiment, HVACR unit 100 is a packaged HVACR unit. In an embodiment, HVACR unit 100 is a furnace. HVACR unit 100 may include a heat exchanger 114 located inside the enclosure 102. The heat exchanger 114 may be a spine-fin heat exchanger. In HVACR systems, plate-fin heat exchangers may be used as a structural component, while spine-fin heat exchangers and the like may not be relied on as a structural component in some HVACR systems. Structural requirements for HVACR systems may be based on, for example, shipping, vibration ,drop, impact, or compression testing.

Enclosure 102 may surround the other components of HVACR unit 100. Enclosure 102 may be, for example, sheet metal such as structural steel or the like. In an embodiment, enclosure 102 is galvanized steel. In an embodiment, enclosure 102 is painted either before or after formation of the louvers 104. In an embodiment, the enclosure 102 is made of structural steel having a thickness of between at or about 0.02 and at or about 0.03 inches. Throughout this disclosure, “at or about” means subject to, for example, manufacturing tolerances or ordinary variation that does not result in a change in properties. Enclosure 102 may be made of multiple segments, connected to one another at, for example, flanges or corners. One or more segments of enclosure 102 may include louvers 104, according to an embodiment.

Louvers 104 are openings in enclosure 102 allowing airflow into the HVACR unit 100. Louvers 104 have an elongated shape with a major axis, with a first end 108 and a second end 110 opposite the first along the major axis. Louvers 104 may be rounded at the first and/or second ends 108, 110. In an embodiment, lovers 104 have a rounded hexagonal shape. In an embodiment, louvers 104 are circular in shape. Each of louvers 104 may have the same size and shape. Louvers 104 may include a section extending away from an inner surface of enclosure 102, towards an inside of HVACR unit 100. Pressure drop across a louver 104 is a factor indicating whether an HVACR unit having an enclosure 102 can receive sufficient airflow through the enclosure 102, with lower pressure drops indicating increased airflow. Louvers 104 may be arranged into an array having an asymmetrically staggered pattern. In the embodiment shown in FIG. 1, louvers 104 are arranged with their major axis extending in a vertical direction 112 of HVACR unit 100. The louvers 104 are arranged into columns, with each column being staggered from the adjacent columns. The staggering of adjacent columns is asymmetrical, such that a midpoint of a space 106 between louvers 104 is not at a midpoint of an adjacent louver 104. The midpoint of a space 106 between louvers 104 may be offset towards a first end 108 or second end 110 of a louver 104 in an adjacent column. In an embodiment, the offset is such that a position, in a vertical direction 112 of HVACR unit 100, of a midpoint of a space 106 between the louvers 104 is between 60% and 90% of the length of a louver 104 away from a first end 108 of an adjacent louver 104, and 40% to 10% of the length of a louver 104 away from a second end 110 of the adjacent louver 104. In an embodiment, the offset is such that a midpoint of a space 106 between the louvers 104 is between 70% and 90% of the length of a louver 104 away from a first end 108 of an adjacent louver 104, and 30% to 10% of the length of a louver 104 away from a second end 110 of the adjacent louver 104. In an embodiment, the offset is such that a midpoint of a space 106 between the louvers 104 is at or about 70% of the length of a louver 104 away from a first end 108 of an adjacent louver 104, and at or about 30% of the length of a louver 104 away from a second end 110 of the adjacent louver 104. The extent of the offset between adjacent rows or columns of louvers 104 may be based on the size of the louvers 104 themselves, and may scale with changes to the size of the louvers 104, for example for different applications, units having different sizes, etc.

In an embodiment where the HVACR unit 100 is an outdoor unit for a residential air conditioner, louvers 104 may each be at or about 3.5 inches long along the major axis, between the first and second ends 108, 110. In this embodiment, louvers 104 within each column may be spaced apart by at or about 0.5 inches from the second end 110 of a first louver to a first end 108 of an adjacent second louver within the same column. In this embodiment, each column may include between 10 and 16 louvers.

The size of the louvers 104 and the number of louvers located in a column or on an enclosure 102 may be varied, for example based on the free area required to obtain sufficient airflow to the HVACR unit 100, where the free area is the sum of the area of the openings of all of the louvers 104 of the enclosure 102.

FIG. 2 is a view of a pattern of louvers 202 on a surface 200 of an enclosure, according to an embodiment. The pattern of louvers 202 may be repeated over a surface of an enclosure such as enclosure 102 described above and shown in FIG. 1. The pattern of louvers 202 may be repeated over one or more segments of an enclosure, such as enclosure 102. In an embodiment, louvers 202 are arranged in this pattern on a plurality of side surfaces of an HVACR unit (e.g. 100 in FIG. 1).

In the embodiment shown in FIG. 2, louvers 202 are arranged such that a major axis 220 of each louver 202 extends in a vertical direction 204. Each of louvers 202 may have the same dimensions, including a length 218. In the embodiment shown in FIG. 2, louvers 202 are arranged into first columns 206 and second columns 208. The array of louvers 202 alternates first columns 206 and second columns 208 such that a first column 206 has a second column 208 adjacent to it on at least one side, and such that a second column 208 has at least one first column 206 adjacent to it on at least one side. First columns 206 and second columns 208 are offset with respect to one another in the vertical direction 204. The first and second columns 206, 208 are offset with respect to one another by a distance 210. Distance 210 may be expressed as a percentage of a length 218 of an individual louver 202 along its major axis 220. In an embodiment, distance 210 is between at or about 10% and at or about 40% of the length 218 of an individual louver 202 along its major axis 220. In an embodiment, distance 210 is between at or about 60% and at or about 90% of the length of an individual louver 202 along its major axis 220. In an embodiment, distance 210 is at or about 30% of the length of an individual louver 202. In an embodiment, distance 210 is at or about 70% of the length of an individual louver 202.

Offsetting first and second columns 206, 208 by distance 210 results in a midpoint of a space 212 between two louvers 202 in a column being located at a position in the vertical direction 204 corresponding to a position along a louver 202 in at least one adjacent column 206 or 208 that is between a first end 214 and a second end 216 of the louver 202 in the adjacent column 206 or 208. In an embodiment, the offset is such that a position, in a vertical direction 204, of a midpoint of a space 212 between the louvers 202 is between 60% and 90% of the length 218 of a louver 202 away from a first end 214 of an adjacent louver 202, and 40% to 10% of the length 218 of a louver 202 away from a second end 216 of the adjacent louver 202. In an embodiment, the offset is such that a midpoint of a space 212 is between 70% and 90% of the length 218 of a louver 202 away from a first end 214 of an adjacent louver 202, and 30% to 10% of the length 218 of a louver 202 away from a second end 216 of the adjacent louver 202. In an embodiment, the offset is such that a midpoint of a space 212 between the louvers 202 is at or about 70% of the length 218 of a louver 202 away from a first end 214 of an adjacent louver 202, and at or about 30% of the length 218 of a louver 202 away from a second end 216 of the adjacent louver 202.

The offset between first and second columns 206, 208 may be described as an offset between the rows of first columns 206 and the rows of second columns 208. The offset may be by distance 210 as described above.

FIG. 3 is a cross-section of an individual louver 300, according to an embodiment. Louver 300 is formed in a wall 302 of the enclosure (e.g. 102 in FIG. 1). Wall 302 has an outer surface 304 that faces the outside of the enclosure and an inner surface 306 that faces an inside of the enclosure. Louver 300 includes a curved section 308 and an extending section 310 that extends from the inner surface 306 towards an inside of the enclosure. At the end of extending section 310 is the opening 312 of the louver 300, providing fluid communication between an exterior of the enclosure and an interior of the enclosure. Airflow is represented by the block arrow in FIG. 3.

Curved section 308 is located where louver 300 begins to deviate from the outer surface 304 of wall 302. Curved section 308 may have a radius less than a thickness of wall 302. Curved section 308 may define an inlet of louver 300 on outer surface 304 of wall 302. Curved section 308 may be located between wall 302 and extending section 310. Curved section 308 is a smooth surface and does not include an abrupt shift such as a sharp edge. Curved section 308 allows airflow into louver 300 to be less turbulent than, for example, a sharp edge. In an embodiment, the curved section 308 extends over a thickness of wall 302.

Extending section 310 extends from curved section 308 towards an inside of the enclosure having louver 300. The length of the extending section 310 provides a depth of each louver 300. The depth of each louver 300 may affect the airflow through the louver 300, and into or out of the enclosure. In an embodiment, the depth of the louvers 300 is selected based on the airflow requirements of the HVACR unit.

In an embodiment, the extending section 310 forms an angle θ with respect to the plane of wall 302. In an embodiment, θ may be at or about 80 degrees. The angle between the wall 302 and extending section 310 of each of the louvers 300 of the enclosure affects the airflow into or out of the enclosure, and accordingly affects the pressure drop across the enclosure.

At the end of extending section 310 is the opening 312 of the louver 300. The opening 312 of the louver 300 is an area through which airflow may travel, for example from outside the enclosure to inside of the enclosure having louver 300. The sum of the area of the openings 312 of louvers 300 for an enclosure is the free area of the enclosure, which affects airflow through the enclosure into or out of the HVACR unit. In an embodiment, the free area of the enclosure is selected based on the airflow requirements of the HVACR unit.

Louver 300 may be formed by an extrusion process. The extrusion process for forming louver 300 may include cutting out a section of sheet metal that forms wall 302, then using a die to press the sheet metal to form the final shape of the louver 300 including curved section 308 and extending section 310. In an embodiment, the cutting and pressing may be performed in a single step. In an embodiment, an entire row or column of louvers 300 may be formed by tooling including multiple dies. In an embodiment, two or more entire adjacent rows or columns of louvers 300 may be formed by tooling including multiple dies.

FIG. 4 is a view of a pattern of louvers 402 on a surface 400 of an enclosure, according to an embodiment. The pattern of louvers 402 may be repeated over a surface of an enclosure such as enclosure 402 described above and shown in FIG. 4. The pattern of louvers 402 may be repeated over one or more segments of an enclosure, such as enclosure 402. In an embodiment, louvers 402 are arranged in this pattern on a plurality of side surfaces of an HVACR unit enclosure (e.g. 402 in FIG. 4).

In the embodiment shown in FIG. 4, louvers 402 are arranged such that a major axis 420 of each louver 402 extends in a horizontal direction 404. Each of louvers 402 may have the same dimensions. In the embodiment shown in FIG. 4, louvers 402 are arranged into first rows 406 and second rows 408. The array of louvers 402 alternates first rows 406 and second rows 408 such that a first row 406 has a second row 408 adjacent to it above and/or below the first row 406 and such that a second row 408 has at least one first row 406 adjacent to it above and/or below the second row 408. First rows 406 and second rows 408 are offset with respect to one another in the horizontal direction 404. The first and second rows 406, 408 are offset with respect to one another by a distance 410. Distance 410 may be expressed as a percentage of a length 418 of an individual louver 402 along its major axis 420. In an embodiment, distance 410 is between at or about 10% and at or about 40% of the length 418 of an individual louver 402 along its major axis 420. In an embodiment, distance 410 is between at or about 60% and at or about 90% of the length 418 of an individual louver 402 along its major axis 420. In an embodiment, distance 410 is at or about 30% of the length 418 of an individual louver 402. In an embodiment, distance 410 is at or about 70% of the length 418 of an individual louver 402.

Offsetting first and second rows 406, 408 by distance 410 results in a midpoint of a space 412 between two louvers 402 in a row 406 or 408 being located at a position in the horizontal direction 404 corresponding to a position along a louver 402 in at least one adjacent row 406 or 408 that is between a first end 414 and a second end 416 of the adjacent louver 402. In an embodiment, the offset is such that a position, in a horizontal direction 404, of a midpoint of a space 412 between the louvers 402 is between 60% and 90% of the length 418 of a louver 402 away from a first end 414 of an adjacent louver 402, and 40% to 10% of the length 418 of a louver 402 away from a second end 416 of the adjacent louver 402. In an embodiment, the offset is such that a midpoint of a space 412 is between 70% and 90% of the length 418 of a louver 402 away from a first end 414 of an adjacent louver 402, and 30% to 10% of the length 418 of a louver 402 away from a second end 416 of the adjacent louver 402. In an embodiment, the offset is such that a midpoint of a space 412 between the louvers 402 is at or about 70% of the length 418 of a louver 402 away from a first end 414 of an adjacent louver 402, and at or about 30% of the length 418 of a louver 402 away from a second end 416 of the adjacent louver 402.

The offset between first and second rows 406, 408 may be described as an offset between the columns of first rows 406 and the columns of second rows 408. The offset may be by distance 410 as described above.

FIG. 5 is a prior art HVACR unit 500 having a symmetric array of openings 502. The HVACR unit 500 has openings 502 that have an elongated shape with rounded ends, but the openings 502 are regularly arranged in a grid pattern where both rows and columns are fully aligned with one another. The rows and/or columns of openings 502 are not offset with respect to one another.

Aspects:

Aspect 1. A heating, ventilation, air conditioning, and refrigeration (HVACR) unit enclosure, comprising:

a surface; and

a plurality of louvers disposed on the surface,

wherein the plurality of louvers are arranged in an array and wherein adjacent louvers are asymmetrically offset from one another in at least one direction.

Aspect 2. The HVACR unit enclosure according to aspect 1, wherein the plurality of louvers are oriented in a vertical direction of the HVACR unit enclosure, and wherein a first column of the plurality of louvers is vertically offset from a second column of the plurality of louvers, the second column of the plurality of louvers adjacent to the first column of the plurality of louvers.

Aspect 3. The HVACR unit enclosure according to aspect 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 10% and at or about 40% of the length.

Aspect 4. The HVACR unit enclosure according to aspect 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 60% and at or about 90% of the length.

Aspect 5. The HVACR unit enclosure according to aspect 2 or aspect 3, wherein each of the plurality of louvers has a length along the major axis, and the first column and the second column are offset from one another by between at or about 10% and at or about 30% of the length.

Aspect 6. The HVACR unit enclosure according to aspect 2 or aspect 4, wherein each of the plurality of louvers has a length along the major axis, and the first column and the second column are offset from one another by between at or about 70% and at or about 90% of the length.

Aspect 7. The HVACR unit enclosure according to aspect 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by at or about 30% of the length or by at or about 70% of the length.

Aspect 8. The HVACR unit enclosure according to any of aspects 2-7, wherein the first column and the second column each include between 10 and 16 louvers.

Aspect 9. The HVACR unit enclosure according to any of aspects 1-9, wherein each of the plurality of louvers includes:

a radiused section defining an opening at the surface of the HVACR unit enclosure;

a section extending towards an inside of the HVACR unit enclosure from the radiused section.

Aspect 10. The HVACR unit enclosure according to aspect 10, wherein an angle between the section extending towards an inside of the HVACR unit enclosure and the surface of the HVACR unit enclosure is at or about 80 degrees.

Aspect 11. An HVACR unit, comprising:

the HVACR unit enclosure according to any of aspects 1-11; and

a spine-fin heat exchanger located within the HVACR unit enclosure.

Aspect 12. An HVACR unit, comprising:

the HVACR unit enclosure according to any of aspects 2-11; and

a spine-fin heat exchanger located within the HVACR unit enclosure.

The examples disclosed in this application are to be considered in all respects as illustrative and not limitative. The scope of the disclosure is indicated by the appended claims rather than by the foregoing description; and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein. 

1. A heating, ventilation, air conditioning, and refrigeration (HVACR) unit enclosure, comprising: a surface; and a plurality of louvers disposed on the surface, wherein the plurality of louvers are arranged in an array and wherein adjacent louvers are asymmetrically offset from one another in at least one direction.
 2. The HVACR unit enclosure according to claim 1, wherein the plurality of louvers are oriented in a vertical direction of the HVACR unit enclosure, and wherein a first column of the plurality of louvers is vertically offset from a second column of the plurality of louvers, the second column of the plurality of louvers adjacent to the first column of the plurality of louvers.
 3. The HVACR unit enclosure of claim 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 10% and at or about 40% of the length.
 4. The HVACR unit enclosure of claim 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 60% and at or about 90% of the length.
 5. The HVACR unit enclosure of claim 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 10% and at or about 30% of the length.
 6. The HVACR unit enclosure of claim 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by between at or about 70% and at or about 90% of the length.
 7. The HVACR unit enclosure of claim 2, wherein each of the plurality of louvers has a length along a major axis, and the first column and the second column are offset from one another by at or about 30% of the length or by at or about 70% of the length.
 8. The HVACR unit enclosure of claim 2, wherein the first column and the second column each include between 10 and 16 louvers.
 9. The HVACR unit enclosure of claim 1, wherein each of the plurality of louvers includes: a radiused section defining an opening at the surface of the HVACR unit enclosure; and a section extending towards an inside of the HVACR unit enclosure from the radiused section.
 10. The HVACR unit enclosure of claim 16, wherein an angle between the section extending towards the inside of the HVACR unit enclosure and the surface of the HVACR unit enclosure is at or about 80 degrees.
 11. An HVACR unit, comprising: the HVACR unit enclosure of claim 1; and a spine-fin heat exchanger located within the HVACR unit enclosure.
 12. An HVACR unit, comprising: the HVACR unit enclosure of claim 2; and a spine-fin heat exchanger located within the HVACR unit enclosure. 